38705421 has 8 divisors (see below), whose sum is σ = 51757344. Its totient is φ = 25728560.

The previous prime is 38705417. The next prime is 38705449. The reversal of 38705421 is 12450783.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 38705421 - 2² = 38705417 is a prime.

It is a super-2 number, since 2×38705421² = 2996219229574482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38705621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17550 + ... + 19631.

It is an arithmetic number, because the mean of its divisors is an integer number (6469668).

Almost surely, 2^38705421 is an apocalyptic number.

It is an amenable number.

38705421 is a deficient number, since it is larger than the sum of its proper divisors (13051923).

38705421 is a wasteful number, since it uses less digits than its factorization.

38705421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37531.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 38705421 is about 6221.3680971310. The cubic root of 38705421 is about 338.2651567083.

The spelling of 38705421 in words is "thirty-eight million, seven hundred five thousand, four hundred twenty-one".